annotate tests/test-simplemerge.py @ 48584:74973a6d4e67

filemerge: always define a "base" label It simplifies the code and improves the conflict markers to always have the "base" label defined. Differential Revision: https://phab.mercurial-scm.org/D12016
author Martin von Zweigbergk <martinvonz@google.com>
date Thu, 20 Jan 2022 14:13:12 -0800
parents 7ed4c4753891
children 6000f5b25c9b
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1 # Copyright (C) 2004, 2005 Canonical Ltd
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2 #
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3 # This program is free software; you can redistribute it and/or modify
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4 # it under the terms of the GNU General Public License as published by
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5 # the Free Software Foundation; either version 2 of the License, or
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6 # (at your option) any later version.
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7 #
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8 # This program is distributed in the hope that it will be useful,
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9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 # GNU General Public License for more details.
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12 #
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13 # You should have received a copy of the GNU General Public License
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14 # along with this program; if not, see <http://www.gnu.org/licenses/>.
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15
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16 from __future__ import absolute_import
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17
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18 import unittest
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19 from mercurial import (
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20 error,
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21 simplemerge,
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22 util,
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23 )
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24
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25 from mercurial.utils import stringutil
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26
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27 TestCase = unittest.TestCase
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28 # bzr compatible interface, for the tests
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29 class Merge3(simplemerge.Merge3Text):
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30 """3-way merge of texts.
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31
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32 Given BASE, OTHER, THIS, tries to produce a combined text
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33 incorporating the changes from both BASE->OTHER and BASE->THIS.
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34 All three will typically be sequences of lines."""
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35
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36 def __init__(self, base, a, b):
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37 basetext = b'\n'.join([i.strip(b'\n') for i in base] + [b''])
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38 atext = b'\n'.join([i.strip(b'\n') for i in a] + [b''])
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39 btext = b'\n'.join([i.strip(b'\n') for i in b] + [b''])
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40 if (
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41 stringutil.binary(basetext)
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42 or stringutil.binary(atext)
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43 or stringutil.binary(btext)
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44 ):
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45 raise error.Abort(b"don't know how to merge binary files")
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46 simplemerge.Merge3Text.__init__(
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47 self, basetext, atext, btext, base, a, b
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48 )
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49
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51 def split_lines(t):
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52 return util.stringio(t).readlines()
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53
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54
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55 ############################################################
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56 # test case data from the gnu diffutils manual
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57 # common base
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58 TZU = split_lines(
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59 b""" The Nameless is the origin of Heaven and Earth;
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60 The named is the mother of all things.
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61
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62 Therefore let there always be non-being,
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63 so we may see their subtlety,
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64 And let there always be being,
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65 so we may see their outcome.
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66 The two are the same,
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67 But after they are produced,
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68 they have different names.
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69 They both may be called deep and profound.
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70 Deeper and more profound,
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71 The door of all subtleties!
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72 """
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73 )
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74
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75 LAO = split_lines(
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76 b""" The Way that can be told of is not the eternal Way;
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77 The name that can be named is not the eternal name.
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78 The Nameless is the origin of Heaven and Earth;
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79 The Named is the mother of all things.
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80 Therefore let there always be non-being,
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81 so we may see their subtlety,
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82 And let there always be being,
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83 so we may see their outcome.
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84 The two are the same,
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85 But after they are produced,
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86 they have different names.
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87 """
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88 )
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89
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90
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91 TAO = split_lines(
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92 b""" The Way that can be told of is not the eternal Way;
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93 The name that can be named is not the eternal name.
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94 The Nameless is the origin of Heaven and Earth;
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95 The named is the mother of all things.
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96
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97 Therefore let there always be non-being,
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98 so we may see their subtlety,
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99 And let there always be being,
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100 so we may see their result.
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101 The two are the same,
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102 But after they are produced,
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103 they have different names.
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104
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105 -- The Way of Lao-Tzu, tr. Wing-tsit Chan
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106
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107 """
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108 )
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109
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110 MERGED_RESULT = split_lines(
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111 b"""\
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112 The Way that can be told of is not the eternal Way;
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113 The name that can be named is not the eternal name.
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114 The Nameless is the origin of Heaven and Earth;
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115 The Named is the mother of all things.
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116 Therefore let there always be non-being,
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117 so we may see their subtlety,
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118 And let there always be being,
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119 so we may see their result.
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120 The two are the same,
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121 But after they are produced,
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122 they have different names.\
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123 \n<<<<<<< LAO\
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124 \n=======
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125
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126 -- The Way of Lao-Tzu, tr. Wing-tsit Chan
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127 \
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128 \n>>>>>>> TAO
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129 """
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130 )
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131
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132
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133 class TestMerge3(TestCase):
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134 def log(self, msg):
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135 pass
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136
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137 def test_no_changes(self):
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138 """No conflicts because nothing changed"""
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139 m3 = Merge3([b'aaa', b'bbb'], [b'aaa', b'bbb'], [b'aaa', b'bbb'])
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140
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141 self.assertEqual(
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142 list(m3.find_sync_regions()),
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143 [(0, 2, 0, 2, 0, 2), (2, 2, 2, 2, 2, 2)],
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144 )
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145
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146 self.assertEqual(list(m3.merge_regions()), [(b'unchanged', 0, 2)])
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147
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148 self.assertEqual(
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149 list(m3.merge_groups()), [(b'unchanged', [b'aaa', b'bbb'])]
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150 )
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151
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152 def test_front_insert(self):
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153 m3 = Merge3([b'zz'], [b'aaa', b'bbb', b'zz'], [b'zz'])
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154
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155 # todo: should use a sentinel at end as from get_matching_blocks
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156 # to match without zz
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157 self.assertEqual(
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158 list(m3.find_sync_regions()),
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159 [(0, 1, 2, 3, 0, 1), (1, 1, 3, 3, 1, 1)],
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160 )
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161
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162 self.assertEqual(
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163 list(m3.merge_regions()), [(b'a', 0, 2), (b'unchanged', 0, 1)]
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164 )
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165
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166 self.assertEqual(
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167 list(m3.merge_groups()),
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168 [(b'a', [b'aaa', b'bbb']), (b'unchanged', [b'zz'])],
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169 )
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170
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171 def test_null_insert(self):
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172 m3 = Merge3([], [b'aaa', b'bbb'], [])
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173 # todo: should use a sentinel at end as from get_matching_blocks
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174 # to match without zz
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175 self.assertEqual(list(m3.find_sync_regions()), [(0, 0, 2, 2, 0, 0)])
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176
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177 self.assertEqual(list(m3.merge_regions()), [(b'a', 0, 2)])
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178
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179 self.assertEqual(
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180 simplemerge.render_minimized(m3), ([b'aaa', b'bbb'], False)
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181 )
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182
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183 def test_no_conflicts(self):
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184 """No conflicts because only one side changed"""
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185 m3 = Merge3(
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186 [b'aaa', b'bbb'], [b'aaa', b'111', b'bbb'], [b'aaa', b'bbb']
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187 )
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188
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189 self.assertEqual(
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190 list(m3.find_sync_regions()),
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191 [(0, 1, 0, 1, 0, 1), (1, 2, 2, 3, 1, 2), (2, 2, 3, 3, 2, 2)],
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192 )
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193
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194 self.assertEqual(
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195 list(m3.merge_regions()),
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196 [(b'unchanged', 0, 1), (b'a', 1, 2), (b'unchanged', 1, 2)],
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197 )
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198
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199 def test_append_a(self):
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200 m3 = Merge3(
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201 [b'aaa\n', b'bbb\n'],
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202 [b'aaa\n', b'bbb\n', b'222\n'],
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203 [b'aaa\n', b'bbb\n'],
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204 )
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205
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206 self.assertEqual(
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207 b''.join(simplemerge.render_minimized(m3)[0]), b'aaa\nbbb\n222\n'
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208 )
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209
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210 def test_append_b(self):
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211 m3 = Merge3(
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212 [b'aaa\n', b'bbb\n'],
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213 [b'aaa\n', b'bbb\n'],
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214 [b'aaa\n', b'bbb\n', b'222\n'],
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215 )
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216
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217 self.assertEqual(
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218 b''.join(simplemerge.render_minimized(m3)[0]), b'aaa\nbbb\n222\n'
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219 )
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220
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221 def test_append_agreement(self):
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222 m3 = Merge3(
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223 [b'aaa\n', b'bbb\n'],
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224 [b'aaa\n', b'bbb\n', b'222\n'],
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225 [b'aaa\n', b'bbb\n', b'222\n'],
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226 )
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227
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228 self.assertEqual(
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229 b''.join(simplemerge.render_minimized(m3)[0]), b'aaa\nbbb\n222\n'
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230 )
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231
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232 def test_append_clash(self):
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233 m3 = Merge3(
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234 [b'aaa\n', b'bbb\n'],
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235 [b'aaa\n', b'bbb\n', b'222\n'],
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236 [b'aaa\n', b'bbb\n', b'333\n'],
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237 )
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238
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239 ml, conflicts = simplemerge.render_minimized(
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240 m3,
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241 name_a=b'a',
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242 name_b=b'b',
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243 start_marker=b'<<',
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244 mid_marker=b'--',
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245 end_marker=b'>>',
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246 )
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247 self.assertEqual(
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248 b''.join(ml),
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249 b'aaa\n' b'bbb\n' b'<< a\n' b'222\n' b'--\n' b'333\n' b'>> b\n',
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250 )
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251
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252 def test_insert_agreement(self):
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253 m3 = Merge3(
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254 [b'aaa\n', b'bbb\n'],
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255 [b'aaa\n', b'222\n', b'bbb\n'],
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256 [b'aaa\n', b'222\n', b'bbb\n'],
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257 )
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258
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259 ml, conflicts = simplemerge.render_minimized(
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260 m3,
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261 name_a=b'a',
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262 name_b=b'b',
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263 start_marker=b'<<',
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264 mid_marker=b'--',
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265 end_marker=b'>>',
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266 )
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267 self.assertEqual(b''.join(ml), b'aaa\n222\nbbb\n')
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268
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269 def test_insert_clash(self):
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270 """Both try to insert lines in the same place."""
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271 m3 = Merge3(
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272 [b'aaa\n', b'bbb\n'],
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273 [b'aaa\n', b'111\n', b'bbb\n'],
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274 [b'aaa\n', b'222\n', b'bbb\n'],
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275 )
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276
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277 self.assertEqual(
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278 list(m3.find_sync_regions()),
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279 [(0, 1, 0, 1, 0, 1), (1, 2, 2, 3, 2, 3), (2, 2, 3, 3, 3, 3)],
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280 )
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281
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282 self.assertEqual(
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283 list(m3.merge_regions()),
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284 [
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285 (b'unchanged', 0, 1),
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286 (b'conflict', 1, 1, 1, 2, 1, 2),
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287 (b'unchanged', 1, 2),
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288 ],
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289 )
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290
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291 self.assertEqual(
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292 list(m3.merge_groups()),
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293 [
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294 (b'unchanged', [b'aaa\n']),
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295 (b'conflict', ([], [b'111\n'], [b'222\n'])),
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296 (b'unchanged', [b'bbb\n']),
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297 ],
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298 )
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299
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300 ml, conflicts = simplemerge.render_minimized(
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301 m3,
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302 name_a=b'a',
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303 name_b=b'b',
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304 start_marker=b'<<',
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305 mid_marker=b'--',
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306 end_marker=b'>>',
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307 )
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308 self.assertEqual(
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309 b''.join(ml),
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310 b'''aaa
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311 << a
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312 111
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313 --
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314 222
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315 >> b
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316 bbb
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317 ''',
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318 )
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319
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320 def test_replace_clash(self):
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321 """Both try to insert lines in the same place."""
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322 m3 = Merge3(
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323 [b'aaa', b'000', b'bbb'],
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324 [b'aaa', b'111', b'bbb'],
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325 [b'aaa', b'222', b'bbb'],
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326 )
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327
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328 self.assertEqual(
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329 list(m3.find_sync_regions()),
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330 [(0, 1, 0, 1, 0, 1), (2, 3, 2, 3, 2, 3), (3, 3, 3, 3, 3, 3)],
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331 )
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332
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333 def test_replace_multi(self):
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334 """Replacement with regions of different size."""
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335 m3 = Merge3(
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336 [b'aaa', b'000', b'000', b'bbb'],
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337 [b'aaa', b'111', b'111', b'111', b'bbb'],
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338 [b'aaa', b'222', b'222', b'222', b'222', b'bbb'],
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339 )
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340
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341 self.assertEqual(
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342 list(m3.find_sync_regions()),
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343 [(0, 1, 0, 1, 0, 1), (3, 4, 4, 5, 5, 6), (4, 4, 5, 5, 6, 6)],
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344 )
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345
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346 def test_merge_poem(self):
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347 """Test case from diff3 manual"""
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348 m3 = Merge3(TZU, LAO, TAO)
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349 ml, conflicts = simplemerge.render_minimized(m3, b'LAO', b'TAO')
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350 self.log(b'merge result:')
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351 self.log(b''.join(ml))
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352 self.assertEqual(ml, MERGED_RESULT)
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353
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354 def test_binary(self):
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355 with self.assertRaises(error.Abort):
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356 Merge3([b'\x00'], [b'a'], [b'b'])
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357
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358 def test_dos_text(self):
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359 base_text = b'a\r\n'
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360 this_text = b'b\r\n'
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361 other_text = b'c\r\n'
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362 m3 = Merge3(
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363 base_text.splitlines(True),
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364 other_text.splitlines(True),
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365 this_text.splitlines(True),
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366 )
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367 m_lines, conflicts = simplemerge.render_minimized(m3, b'OTHER', b'THIS')
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368 self.assertEqual(
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369 b'<<<<<<< OTHER\r\nc\r\n=======\r\nb\r\n'
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370 b'>>>>>>> THIS\r\n'.splitlines(True),
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371 m_lines,
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372 )
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373
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374 def test_mac_text(self):
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375 base_text = b'a\r'
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376 this_text = b'b\r'
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377 other_text = b'c\r'
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378 m3 = Merge3(
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379 base_text.splitlines(True),
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380 other_text.splitlines(True),
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381 this_text.splitlines(True),
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382 )
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383 m_lines, conflicts = simplemerge.render_minimized(m3, b'OTHER', b'THIS')
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384 self.assertEqual(
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385 b'<<<<<<< OTHER\rc\r=======\rb\r'
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386 b'>>>>>>> THIS\r'.splitlines(True),
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387 m_lines,
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388 )
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389
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390
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391 if __name__ == '__main__':
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392 import silenttestrunner
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393
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394 silenttestrunner.main(__name__)